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| # =================================================================== | |
| # | |
| # Copyright (c) 2014, Legrandin <helderijs@gmail.com> | |
| # All rights reserved. | |
| # | |
| # Redistribution and use in source and binary forms, with or without | |
| # modification, are permitted provided that the following conditions | |
| # are met: | |
| # | |
| # 1. Redistributions of source code must retain the above copyright | |
| # notice, this list of conditions and the following disclaimer. | |
| # 2. Redistributions in binary form must reproduce the above copyright | |
| # notice, this list of conditions and the following disclaimer in | |
| # the documentation and/or other materials provided with the | |
| # distribution. | |
| # | |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
| # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
| # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| # POSSIBILITY OF SUCH DAMAGE. | |
| # =================================================================== | |
| from Crypto.Util.py3compat import bord | |
| from Crypto.Util._raw_api import (load_pycryptodome_raw_lib, | |
| VoidPointer, SmartPointer, | |
| create_string_buffer, | |
| get_raw_buffer, c_size_t, | |
| c_uint8_ptr) | |
| _raw_ripemd160_lib = load_pycryptodome_raw_lib( | |
| "Crypto.Hash._RIPEMD160", | |
| """ | |
| int ripemd160_init(void **shaState); | |
| int ripemd160_destroy(void *shaState); | |
| int ripemd160_update(void *hs, | |
| const uint8_t *buf, | |
| size_t len); | |
| int ripemd160_digest(const void *shaState, | |
| uint8_t digest[20]); | |
| int ripemd160_copy(const void *src, void *dst); | |
| """) | |
| class RIPEMD160Hash(object): | |
| """A RIPEMD-160 hash object. | |
| Do not instantiate directly. | |
| Use the :func:`new` function. | |
| :ivar oid: ASN.1 Object ID | |
| :vartype oid: string | |
| :ivar block_size: the size in bytes of the internal message block, | |
| input to the compression function | |
| :vartype block_size: integer | |
| :ivar digest_size: the size in bytes of the resulting hash | |
| :vartype digest_size: integer | |
| """ | |
| # The size of the resulting hash in bytes. | |
| digest_size = 20 | |
| # The internal block size of the hash algorithm in bytes. | |
| block_size = 64 | |
| # ASN.1 Object ID | |
| oid = "1.3.36.3.2.1" | |
| def __init__(self, data=None): | |
| state = VoidPointer() | |
| result = _raw_ripemd160_lib.ripemd160_init(state.address_of()) | |
| if result: | |
| raise ValueError("Error %d while instantiating RIPEMD160" | |
| % result) | |
| self._state = SmartPointer(state.get(), | |
| _raw_ripemd160_lib.ripemd160_destroy) | |
| if data: | |
| self.update(data) | |
| def update(self, data): | |
| """Continue hashing of a message by consuming the next chunk of data. | |
| Args: | |
| data (byte string/byte array/memoryview): The next chunk of the message being hashed. | |
| """ | |
| result = _raw_ripemd160_lib.ripemd160_update(self._state.get(), | |
| c_uint8_ptr(data), | |
| c_size_t(len(data))) | |
| if result: | |
| raise ValueError("Error %d while instantiating ripemd160" | |
| % result) | |
| def digest(self): | |
| """Return the **binary** (non-printable) digest of the message that has been hashed so far. | |
| :return: The hash digest, computed over the data processed so far. | |
| Binary form. | |
| :rtype: byte string | |
| """ | |
| bfr = create_string_buffer(self.digest_size) | |
| result = _raw_ripemd160_lib.ripemd160_digest(self._state.get(), | |
| bfr) | |
| if result: | |
| raise ValueError("Error %d while instantiating ripemd160" | |
| % result) | |
| return get_raw_buffer(bfr) | |
| def hexdigest(self): | |
| """Return the **printable** digest of the message that has been hashed so far. | |
| :return: The hash digest, computed over the data processed so far. | |
| Hexadecimal encoded. | |
| :rtype: string | |
| """ | |
| return "".join(["%02x" % bord(x) for x in self.digest()]) | |
| def copy(self): | |
| """Return a copy ("clone") of the hash object. | |
| The copy will have the same internal state as the original hash | |
| object. | |
| This can be used to efficiently compute the digests of strings that | |
| share a common initial substring. | |
| :return: A hash object of the same type | |
| """ | |
| clone = RIPEMD160Hash() | |
| result = _raw_ripemd160_lib.ripemd160_copy(self._state.get(), | |
| clone._state.get()) | |
| if result: | |
| raise ValueError("Error %d while copying ripemd160" % result) | |
| return clone | |
| def new(self, data=None): | |
| """Create a fresh RIPEMD-160 hash object.""" | |
| return RIPEMD160Hash(data) | |
| def new(data=None): | |
| """Create a new hash object. | |
| :parameter data: | |
| Optional. The very first chunk of the message to hash. | |
| It is equivalent to an early call to :meth:`RIPEMD160Hash.update`. | |
| :type data: byte string/byte array/memoryview | |
| :Return: A :class:`RIPEMD160Hash` hash object | |
| """ | |
| return RIPEMD160Hash().new(data) | |
| # The size of the resulting hash in bytes. | |
| digest_size = RIPEMD160Hash.digest_size | |
| # The internal block size of the hash algorithm in bytes. | |
| block_size = RIPEMD160Hash.block_size | |